The .NET Framework 4 is highly compatible with applications that are built with earlier .NET Framework versions, except for some changes that were made to improve security, standards compliance, correctness, reliability, and performance.

Web development is becoming a more prosperous industry lately. Since the Interet and the computer wave in general is becoming quite lucrative, web development is becoming a booming industry in which everyone wants to be a part. However, it is also a very competitive industry since there are many professionals that are quite adept at programming.

Hadoop enables a computing solution that is: 1.Scalable: New nodes can be added as needed, and added without needing to change data formats, how data is loaded, how jobs are written, or the applications on top.
2.Cost effective: Hadoop brings massively parallel computing to commodity servers. The result is a sizeable decrease in the cost per terabyte of storage, which in turn makes it affordable to model all your data.
3.Flexible: Hadoop is schema-less, and can absorb any type of data, structured or not, from any number of sources. Data from multiple sources can be joined and aggregated in arbitrary ways enabling deeper analyses than any one system can provide.